CN104937963A

CN104937963A - Method and device for group communication, having robust mobility

Info

Publication number: CN104937963A
Application number: CN201480005893.7A
Authority: CN
Inventors: 元盛焕; 赵晟娟; E.格特曼
Original assignee: Samsung Electronics Co Ltd
Current assignee: Samsung Electronics Co Ltd
Priority date: 2013-10-28
Filing date: 2014-10-28
Publication date: 2015-09-23
Anticipated expiration: 2034-10-28
Also published as: EP3065429A1; CN104937963B; EP3065429B1; KR20150048618A; KR20150048611A; US20180248708A1; US10009187B2; US20150365963A1; EP3065429A4; KR102221939B1; KR20150048615A; US10560876B2

Abstract

The present invention relates to a method and a device for group communication. More particularly, the present invention relates to a method and a device by which a moving terminal can effectively participate in the group communication. A communication method for a base station in a mobile communication system, according to one embodiment of the present invention, can comprise the steps of: receiving, from an MCE, MBMS bearer-related information including a QoS parameter; updating bearer information on the terminal by using the received MBMS bearer-related information; determining a handover of the terminal and transmitting a handover request message, which includes the MBMS bearer information, to a second base station incapable of supporting an MME or MBMS; transmitting a handover command message from the second base station to the terminal; and transmitting MBMS data to the second base station for a pre-set amount of time. According to one embodiment of the present invention, although the terminal moves to a region at which the MBMS is not provided, a group communication service is quickly provided through a PTP-type communication channel such that the terminal can seamlessly receive the group communication service.

Description

There is the ambulant method and apparatus for group communication of robust

Technical field

The present invention relates to the method and apparatus for group communication.In more detail, the present invention relates to the method and apparatus for making terminal effectively participate in group communication in movement.

Background technology

Develop mobile communication system to provide voice communications services to subscriber in movement.Along with the made rapid progress of technology, except previous except the service of voice, mobile communication system has been evolved to support high speed data communication services.

Up to now, the development of wireless communication system has focused on point-to-point (PTP) communication pattern.At this, term " point " refers to the calling party (or callee) when two users (calling party and callee) communicate with one another.In an exemplary situation, when user attempts access such as http:// www.amazon.com/website time, these two points are user and Amazon server respectively.

Recently, the interest about the group communication service by wireless communication system increases to some extent.Group communication is the general terms of the communication between the multiple participants for describing such as broadcast and so on.

Group communication service can be provided by conventional P TP communication plan.In broadcast example, broadcast provider is provided in broadcast provider and multiple to broadcasting the communication path set up between interested user.But consider the utilization of resources, the efficiency of this method is very low.Ask the exemplary cases of identical or class likelihood data multiple user under, repeating transmission common data by user special PTP path to multiple user, to result in the significant level of resources utilization low.

Therefore, need a kind of can the point-to-multipoint for group communication service (PTM) pattern of efficent use of resources.For PTM pattern communication, Long Term Evolution (LTE) adopts multimedia multicast/broadcast service (Multimedia Multicast Broadcast Service, MBMS).The problem about being provided group communication service by MBMS is actively discussed in third generation partner program (3GPP).

Summary of the invention

Technical problem

The present invention aims to provide a kind of group communication service method of reseptance and device of terminal, described terminal can in the wireless communication system that group communication service is provided by MBMS in movement seamless receipt group communication service.In addition, the present invention aims to provide a kind of group communication service method of reseptance and device of terminal, even if when described terminal enters the region not supporting MBMS, described terminal also can carry out seamless receipt group communication service by communication path is switched to point-to-point (PTP) communication path fast.

Object of the present invention is not limited to above-mentioned purpose, and according to following description, those skilled in the art will be expressly understood other object not described here.

Solution

According to an aspect of the present invention, a kind of communication means of base stations in mobile communication system comprises: multicast broadcast multimedia service (MBMS) beared information containing qos parameter from multiple cell/multicast coordination entity (MCE) receiving package; The MBMS beared information received is used to carry out the beared information of more new terminal; The transfer making terminal determines, and to Mobility Management Entity (MME) or do not support that second base-station transmission of MBMS comprises the handoff-request message of MBMS beared information; From the second base station to terminal transmission handover command message; And to the second base station transmitting MBMS data in scheduled time slot.

Preferably, qos parameter comprises QoS class identifier (QCI), ensures bit rate (GBR) QoS information and distribute and retain at least one in priority (ARP).According to embodiment, ARP can comprise at least one for carrying in distribution and the priority level kept, preemption capability (carry with other and contrast) and fragility of taking the lead (carry with other and contrast).

Preferably, base station can be in the edge in MBMS region or MBMS Single Frequency Network (MBSFN) region.

Preferably, handoff-request message can comprise qos parameter, bearer identifier, down link (DL) transmission propose designator, S-GW transport layer address and at least one in the Tunnel Endpoint Identifier (TEID) of the S-GW of up link (UL) Packet Data Unit (PDU).

Preferably, handoff-request message can also comprise the designator that instruction includes MBMS beared information.

Preferably, upgrade beared information and comprise from end receipt message, described message comprises instruction and is receiving or the interesting information receiving MBMS.

Preferably, in scheduled time slot, comprise the data to the second base-station transmission with designator to the second base station transmitting MBMS data, described designator instruction MBMS data transmission stops.

Preferably, comprise the information receiving and have designator in scheduled time slot to the second base-station transmission MBMS data, described designator instruction stops the transmission of MBMS data.

According to a further aspect in the invention, in mobile communication system, the communication means of terminal comprises: to the first base-station transmission message receiving the MBMS beared information comprising qos parameter from MCE, and described message has instruction and receiving or the interesting information receiving MBMS; Receive handover command message to determine according to the transfer of the first base station from the first base station handover to the second base station not supporting MBMS; Set up the connection with the second base station; The MBMS message forwarded in scheduled time slot by the first base station is received from the second base station; To GCSE-AS message transfer, described message comprises the information of the unavailability of instruction MBMS; And use the second base station to set up carrying.

Preferably, indicate the packets of information of the unavailability of MBMS to move to containing an eNB designator, the 2nd eNB designator, cell-of-origin designator, Target cell designator, terminal identifier, notification terminal not support in the information of the community of MBMS, one or more MBMS realm identifier (SAI) and group communication service identifier (ServiceId) at least one.

According to a further aspect in the invention, a kind of base station comprises communication unit and control unit, and described control unit controls: multicast broadcast multimedia service (MBMS) beared information containing qos parameter from multiple cell/multicast coordination entity (MCE) receiving package; The MBMS beared information received is used to carry out the beared information of more new terminal; The transfer making terminal determines, and to Mobility Management Entity (MME) or do not support that second base-station transmission of MBMS comprises the handoff-request message of MBMS beared information; From the second base-station transmission to terminal handover command message; And to the second base station transmitting MBMS data in scheduled time slot.

According to a further aspect in the invention, a kind of terminal comprises communication unit and control unit, described control unit controls: to the first base-station transmission message receiving the MBMS beared information comprising qos parameter from MCE, and described message has instruction and receiving or the interesting information receiving MBMS; Receive handover command message to determine according to the transfer of the first base station from the first base station handover to the second base station not supporting MBMS; Set up the connection with the second base station; The MBMS message forwarded in scheduled time slot by the first base station is received from the second base station; To GCSE-AS message transfer, described message comprises the information of the unavailability of instruction MBMS; And use the second base station to set up carrying.

According to a further aspect in the invention, a kind of communication means of base stations in mobile communication system comprises: receive information request message from MCE, the quantity of the terminal of described information request message inquire-receive MBMS; Determine the quantity of the terminal receiving MBMS; And the information of the quantity about the terminal receiving MBMS is transmitted to MCE.

According to a further aspect in the invention, in a kind of mobile communication system, the communication means of terminal comprises: determine whether terminal is in the edge in MBMS region; The information at the edge in MBMS region is in GCSE-AS transmission instruction UE; Keep-alive (keep-alive) message is received from GCSE-AS; And carry out signal by point-to-point (PTP) path with GCSE-AS and communicate.

Preferably, receive keep-alive message and comprise transmission package transmits the information of keep-alive message message containing request GCSE-AS.

Preferably, determine that edge that whether terminal is in MBMS region comprises and receive edge indicator from base station, described edge indicator indicating terminal is in the edge in MBMS region.

Preferably, determine that the edge whether terminal is in MBMS region comprises measuring reference signals (RS); And determine whether terminal is in the edge in MBMS region by described RS and predetermined threshold being compared.

Preferably, described method also comprises from GCSE-AS or base station receive threshold.

The beneficial effect of the invention

The advantage of group communication service method of reseptance of the present invention and device is: even if the terminal of participation group communication is when this terminal enters the region not supporting MBMS, also can carry out seamless receipt group communication service by communication path is switched to point-to-point (PTP) communication path fast.

Advantage of the present invention is not limited to above-mentioned advantage, and according to following description, those skilled in the art will be expressly understood other advantage not described here.

Accompanying drawing explanation

Fig. 1 illustrates a kind of according to an embodiment of the invention figure being provided the wireless communication system of group communication service by MBMS;

Fig. 2 illustrates according to an embodiment of the invention based on the signal flow graph of the transfer routine of S1;

Fig. 3 illustrates according to an embodiment of the invention based on the signal flow graph of the transfer routine of X2;

Fig. 4 illustrates that information of collecting according to an embodiment of the invention is for being made at the decision that switches between ptp mode and MBMS pattern to improve the signal flow graph of the routine of the level of resources utilization;

Fig. 5 is the signal flow graph that the UE 100 illustrating according to an embodiment of the invention under idle pulley seamlessly provides the routine of group communication service;

Fig. 6 is the block diagram of the configuration that eNB is according to an embodiment of the invention shown;

Fig. 7 is the block diagram of the configuration that UE is according to an embodiment of the invention shown;

Fig. 8 is the block diagram of the configuration that GCSE-AS is according to an embodiment of the invention shown;

Fig. 9 illustrates the signal flow graph not supporting the eNB place of current QCI value to provide the routine of group communication service according to an embodiment of the invention.

Embodiment

Exemplary embodiment of the present invention is described in detail with reference to accompanying drawing.In whole accompanying drawing, use identical reference numerals to represent same or similar part.For avoiding fuzzy theme of the present invention, the detailed description being merged in known function herein and structure can be omitted.In addition, consider functional in the present invention and define following term, and described term can change according to the intention, usage etc. of user or operator.Therefore, definition should be made on the basis of the overall content of this specification.

Although describe mainly for the Radio Access Network specified in the 3 gpp standards, LTE core network network and evolution block core (EPC), but it will be appreciated by those skilled in the art that without departing from the spirit and scope of the present invention, a small amount of amendment even can be utilized to apply the present invention to have other communication system of similar technical background and channel format.

Fig. 1 illustrates a kind of according to an embodiment of the invention figure being provided the wireless communication system of group communication service by MBMS.

The wireless communication system of group communication service is provided to comprise four elements by multicast broadcast multimedia service (MBMS).With reference to Fig. 1, the wireless communication system of group communication service is provided to comprise subscriber equipment (UE) 100, Long Term Evolution (LTE) 130, evolution block core (EPC) 199 and group communication service enable application server (GCSE-AS) 200 by MBMS.

GCSE-AS 200 is the entities that have accumulated group communication service data thereon.Collect up link (UL) data transmitted by the UE 100 participating in group communication at GCSE-AS 200 place via LTE 130 and EPC 199.Down link (DL) group communication data are sent to UE 100 from GCSE-AS 200 via EPC 199 and LTE 130.

By wave point Un 105 (typically, other interface is wireline interface), UE 100 is connected to LTE 130.In more detail, by Un interface 105, UE 100 is connected to enode b (eNB) 110.

The network of multiple eNB that LTE 130 is connected by complexity.By X2 interface 113, eNB 110 is connected to each other.Each eNB 110 is for UE provides service in its coverage, and described coverage is called as coverage.Because coverage is limited, UE 100 must set up wireless connections by Uu interface 105 with suitable eNB 110 in movement.

Except some exceptions, typically eNB 110 forms one or more community.At this, community is typical cellular system, and eNB 110 manages and controls community.In the following description, object conveniently, can use term " community " and " eNB " interchangeably with identical meanings.In addition, when describing embodiments of the invention, object conveniently, can use term " community " and " eNB " interchangeably with identical meanings.

The DL group communication user data being transferred to eNB 110 can be transmitted to UE by least two paths.One paths is point-to-point (PTP) pattern communication path, and another paths is MBMS path.Ptp mode communication path is the path for DL group communication data to be sent to eNB 110 via GCSE-AS 200, public data network gateway (P-GW) 160 and gateway (S-GW) 150 (order through interface is: SGi 165 → S5/S8155 → S1-U 116).MBMS path is the path for DL group communication user data to be sent to eNB 110 via GCSE-AS 200, broadcast/multicast service center (MB-SC) 180 and MBMS gateway (MBMS GW) 170 (order through interface is: GC2185 → SGi-mb 178 → M1118).

By ptp mode communication path, the UL group communication user data being transferred to eNB 110 from UE 100 can be sent to GCSE-AS 200.In other words, UL group communication user data is sent to GCSE-AS 200 via eNB 110, S-GW 150 and P-GW 160.

Strategy and charging rule functions (PCRF) 190 are responsible for special services streaming quality (QoS) and the charging policy of determining group communication user data.PCRF 190 is connected to P-GW 160 and BM-SC 180 via Gx interface 163 and Gx2 interface 183 respectively, and is connected to GCSE-AS 200 via Rx interface 195.

In order to control the DL group communication user data transmission undertaken by MBMS, be necessary to send MBMS session information to eNB 110, described MBMS session information such as Multicast Channel resource allocation information and modulation and encoding scheme (MCS).Can from least one multiple cell/multicast coordination entity (MCE) 120, Mobility Management Entity (MME) 140, MBMS-GW 170 and GCSE-AS 200 by this information transmission to eNB 110.In order to MBMS transmission session information, respectively define the interface (see table 1) for the transmission from GCSE-AS 200, BM-SC 180, MBMS-GW 170, MME 140 and MCE 120 to eNB110.

Table 1

Interface name	The entity be connected
		GC2(185)	GCSE-AS(200)，BM-SC(180)
SGmb(175)	BM-SC(180)，MBMS-GW(170)
		Sm(173)	MBMS-GW(170)，MME(140)
M3(125)	MME(140)，MCE(120)
		M2(112)	MCE(120)，eNB(110)

As mentioned above, can transmit by ptp mode communication path and/or MBMS path the DL group communication user data being transferred to eNB.According to embodiment, interesting reception and/or can receive DL group communication user data UE concentrate region in (if can MBMS be provided), preferably by MBMS path for UE provides group communication service.In interesting reception and/or can receive in the rare region of the UE of DL group communication user data, preferably with ptp mode for each UE provides group communication service.

According to embodiment, if UE 100 enters non-MBMS region, then group communication service must be provided with ptp mode forcibly.On the contrary, if UE 100 moves to MBMS region from non-MBMS region, then group communication service pattern can be switched to group communication service pattern based on MBMS from the group communication service pattern based on PTP.

As mentioned above, in order to resource efficiency and mobility, UE 100 can switch between ptp mode and MBMS pattern.Now, exit pattern can be made by GCSE-AS 200 and switch decision.

When switching between ptp mode and MBMS pattern in order to the level of resources utilization, the UE 100 receiving service may be in the region supporting ptp mode and MBMS pattern.Therefore, when switching between operator scheme, there is the space seamlessly maintaining group communication service.Such as, when being switched to MBMS pattern from ptp mode, UE can receive group communication service until get out the communication path of MBMS under ptp mode.

Even if when being switched to MBMS pattern in order to mobility from ptp mode, also seamlessly group communication service can be maintained.When moving in the community supporting MBMS pattern and ptp mode from the community of the normal ptp mode of support, UE 100 can receive group communication service until get out the communication path of MBMS under ptp mode.Although describe is for supporting that the community of MBMS pattern is also supported ptp mode and do not supported that the situation of ptp mode is only supported in the community of MBMS pattern, the present invention is not limited thereto.Such as, the community only supporting MBMS pattern may be there is, and even in this case, also can apply the present invention.

Meanwhile, when being switched to ptp mode from MBMS pattern, group communication service may interrupt.Such as, if UE 100 moves to non-MBMS community, then it no longer correctly may can receive group communication service.In this case, when moving to non-MBMS community, group communication service interrupts, and therefore UE 100 must ask group communication service to GCSE-AS 200 again.Therefore, UE 100 may not receive group communication service until group communication service is restarted.

Meanwhile, group communication service may be useful to very important work.Such as, it can be used for public safety by police and fire fighter.In this case, the disruption of group communication service may cause very offending situation.Embodiments of the invention propose the method for overcoming gentle disruption of separating in group communication service.

Fig. 2 illustrates according to an embodiment of the invention based on the signal flow graph of the transfer routine of S1.

According to embodiments of the invention, be established to the radio bearer for group communication service of eNB 110b in advance, to alleviate the disruption of group communication service.

With reference to Fig. 2, before beginning is based on the transfer of S1, MCE 120 can configure MBMS beared information when the MBMS session being established to eNB 110a to an eNB 110a.In step 210, MCE120 can send to an eNB 110a message comprising MBMS beared information.MBMS beared information can comprise qos parameter.Qos parameter can comprise QoS class identifier, ensures bit rate (GBR) QoS information and distribute and retain at least one in priority.GBR QoS information can comprise GBR and Maximum Bit Rate (MBR).According to embodiment, this message can be one in MBMS session start request (MBMS SESSION START REQUEST) message and MBMS session updates request (MBMSSESSION UPDATE REQUEST) message.According to embodiment, ARP can comprise carrying and distributes and keep at least one in priority level, preemption capability (carry with other and contrast) and fragility of taking the lead (carry with other and contrast).

According to embodiment, in step 210, MBMS carrier information only can be directed to an eNB 110a of selection.To an eNB 110a MBMS transmission beared information, to be established to the radio bearer of the 2nd eNB 110b not supporting MBMS in advance to transmit MBMS data.Therefore, MBMS beared information only can be addressed to an eNB 110a at the edge being positioned at MBMS region or MBMS Single Frequency Network (MBSFN).

If receive the message comprising MBMS beared information in step 210, then an eNB 110a store M BMS beared information.In step 215, in response to the message received in step 210, an eNB110a can send response message to MCE 120.Response message can be one that MBMS session start response (MBMS SESSION START RESPONSE) message and MBMS session updates respond in (MBMSSESSION UPDATE RESPONSE) message.

If normally set up MBMS session and complete MBMS radio channel setting and amendment in an eNB 110a, then the UE 100 of service is provided to receive service by MBMS session by an eNB 110a.As shown in phantom in Figure 2, group communication data are sent to UE 100 via GCSE-AS 200, MB-SC 180, MBMS-GW 170 and an eNB 110a.

In step 218, the UE 100 receiving MBMS can send message to an eNB 110a, and this message comprises instruction, and it is receiving MBMS or the interesting information receiving MBMS.This message can be one that MBMS interest indicates in (MBMSInterestIndication) message and MBMS counting response (MBMSCountingResponse) message.According to embodiment, at least one in above-mentioned message can comprise MBMS session, Temporary Mobile Group Identity (TMGI) and every group communication service identifier (service Id, ServiceId) MBMS interest information.Such as, at least one in described message can comprise MBMS Session ID or bitmap, and the bit of wherein said bitmap represents MBMS session.At this, ServiceId can be used to identified group communication service.ServiceId for identified group communication service can be identical with the ServiceId for MBMS, or according to embodiment, the ServiceId for identified group communication service can be the new identifier for group communication.Consider from user perspective, TMGI is used to MBMS to be carried service identifiers to be provided as a kind of with the means of the service of ServiceId mark.

Receiving or the interesting message receiving MBMS if receive notice UE 100 from UE 100, then an eNB 110a stores the information that the receives beared information for renewal UE 100 in step 220.In more detail, the MBMS beared information that the beared information that an eNB 110a can revise UE 100 receives from MCE 120 to be included in step 210.

Subsequently, when UE 100 moves, an eNB 110a may become and no longer be well-suited for UE 100 and provide service.One eNB 110a selects the 2nd eNB 110b to provide the eNB of service as being well-suited for UE 100, and makes the decision transferred to the 2nd eNB 110b in step 221.

In step 225, an eNB 110a can send message to MME 140, and this message comprises the Handoff Request information such as requiring to transfer (HANDOVER REQUIRED) message and so on.Require that handoff message can comprise the information word (IE) of carrying MBMS beared information.IE can comprise at least one in qos parameter, bearer identifier, DL transmission proposal designator, MBMS session indicators, service area identities (SAI), TMGI and ServiceId.According to embodiment, if this message comprises MBMS beared information, then MBMS beared information can comprise new designator, and described new designator is used for notifying that the corresponding informance be associated with MBMS can be contained in MBMS beared information to the 2nd eNB 110b.In addition, except inserting the method for new designator, can also come to notify to use MBMS carrying to MME 140 by making agreement to the use of the bearer identifier that can be assigned to MBMS carrying.

For convenience of description, Fig. 2 is responsible for the situation of an eNB 110a and the 2nd eNB 110b for MME 140.According to embodiment, if an eNB 110a and the 2nd eNB 110b is associated from different MME, then the MME be associated with an eNB 110a can send to the MME be associated with the 2nd eNB 110b and forward RELOCATION REQUEST message.Now, this message can comprise qos parameter, bearer identifier, data transmission capabilities designator and for notifying that corresponding informance is at least one in the new designator of MBMS information.

According to embodiment, forward RELOCATION REQUEST message and can comprise evolution RAB (E-RAB) information.Among E-RAB, the carrying for group communication service can comprise at least one in MBMS session indicators, MBMS SAI, TMGI and ServiceId.In more detail, MME 140 can have the map information between at least one and E-RAB in MBMS session indicators, MBMS SAI, TMGI and ServiceId.MME 140 can use receive from an eNB 110a MBMS session indicators, at least one and map information in MBMS SAI, TMGI and ServiceId to generate E-RAB information, described E-RAB packets of information is containing at least one in MBMS session indicators, MBMS SAI, TMGI and ServiceId.

In step 230, MME 140 can send Handoff Request (HANDOVERREQUEST) message to the 2nd eNB 110b.Handoff-request message can comprise MBMS beared information.At this, MBMS beared information can comprise qos parameter, bearer identifier, data transmission capabilities designator, S-GW 150 transport layer address and at least one in the Tunnel Endpoint Identifier (TEID) of the S-GW 150 of UL Packet Data Unit (PDU).MME 140 can generate the normal ptp mode beared information comprising MBMS beared information, and sends this information to the 2nd eNB 110b, makes MBMS carrying and PTP carrying not be different.

According to embodiment, handoff-request message can comprise E-RAB information.Among E-RAB, the carrying for group communication service can comprise at least one in MBMS session indicators, MBMS SAI, TMGI and ServiceID.In more detail, MME 140 can have the map information between at least one and E-RAB in MBMS session indicators, MBMSSAI, TMGI and ServiceId.MME 140 can use receive from an eNB 110a MBMS session indicators, at least one and map information MBMS SAI, TMGI and ServiceId to generate E-RAB information, described E-RAB packets of information is containing at least one in MBMS session indicators, MBMS SAI, TMGI and ServiceId.

Carried out from MBMS GW 170 by the transfer of data of MBMS, instead of carry out from S-GW 150, and owing to not allowing UL transfer of data, therefore MBMS beared information can not comprise the transport layer address of S-GW 150 and the TEID for UL PDU, and these are different from normal ptp mode beared information.According to embodiment, MME 140 can the transport layer address of arbitrary disposition S-GW 150 and the TEID for UL PDU, and they is sent to the 2nd eNB 110b.In addition, specific transport layer address and/or the TEID for UL PDU can also be sent, described specific transport layer address and/or be configured to instruction MBMS carrying for the TEID of UL PDU corresponding carrying is MBMS carrying to make the 2nd eNB 110b learn.

In step 235, the 2nd eNB 110b can send Handoff Request to MME 140 and confirm (HANDOVER REQUEST ACKNOWLEDGE) message.2nd eNB 110b can determine whether to accept the carrying corresponding with the information be comprised in handoff-request message.Handoff Request acknowledge message can comprise the beared information about the MBMS carrying accepted by the 2nd eNB 110b.MBMS beared information can comprise bearer identifier, qos parameter, the 2nd eNB 110b transport layer address, for DLPDU TEID and for will from the one eNB 110a receive UL/DL data TEID/ transport layer address at least one.

According to embodiment, Handoff Request acknowledge message can comprise E-RAB information.Among E-RAB, MBMS session indicators, MBMS SAI, TMGI, ServiceId and at least one in the TEID/ transport layer address of UL/DL data that will receive from an eNB 110a can be comprised for the carrying of group communication service.In more detail, in step 230, the 2nd eNB 110b can receive E-RAB information from MME 140, and described E-RAB packets of information is containing at least one in MBMS session indicators, MBMS SAI, TMGI and ServiceId.At least one in MBMS session indicators, MBMS SAI, TMGI and ServiceId can be added in the described E-RAB information of at least one comprising in MBMS session indicators, MBMS SAI, TMGI and ServiceId that receives from MME 140 by the 2nd eNB 110b.2nd eNB 110b can also add the TEID/ transport layer address of the UL/DL data for receiving from an eNB 110a to E-RAB information.

In step 245, MME 140 can send handover commands (HANDOVERCOMMAND) message to an eNB 110a.Then, an eNB 110a can send RRC to UE 100 and connect that to reconfigure (RRCConnectionReconfiguration) message synchronous with what obtain with the 2nd eNB 110b, makes the 2nd eNB 110b provide service for UE 100.

According to embodiment, handover command message can comprise E-RAB information.Among E-RAB, the carrying for group communication service can comprise MBMS session indicators, MBMS SAI, TMGI, ServiceId and the TEID/ transport layer address of UL/DL data for receiving from an eNB 110a.In step 235, above-mentioned information can be transferred to MME 140 from eNB 110b.

As shown in phantom in Figure 2, if receive handover command message in step 245, then an eNB110a can use involved transport layer address within the message and TEID MBMS data to be forwarded to the 2nd eNB 110b.According to embodiment, if directly data transmission is possible, then data are directly transferred to the 2nd eNB 110b from an eNB 110a, otherwise, via S-GW 150, data are transferred to the 2nd eNB 110b from an eNB 110a.

Data transmission is carried out in the so a kind of mode being transmitted the data (MBMS E-RAB) received by MBMS path by PTP path (PTP E-RAB).MBMS E-RAB and PTP E-RAB can be mapped by least one in the MBMS received in step 245 session indicators, MBMS SAI, TMGI and ServiceId and MBMS E-RAB information being compared.

In step 255, connect reconfigure message in response to RRC, UE 100 can send RRC connection to the 2nd eNB110b and reconfigure (RRCConnectionReconfigurationComplete) message.Therefore, UE 100 and the 2nd eNB 110b can carry out UL and DL data communication.UE 100 can receive MBMS data via GCSE-AS 200, BM-SC 180, MBMS GW 170, an eNB 110a and the 2nd eNB 110B.According to embodiment, in scheduled time slot, an eNB 110a can to the 2nd eNB 110b transmitting MBMS data.Scheduled time slot can with consider be comprised in MBMS data SYNC layer header in timestamp information and in the temporal information that received by handover command message at least one and value that is preset or that calculate is corresponding.If this period is too short, then, before UE 100 is ready to receive group communication service with ptp mode (after step 290), group communication service may be temporarily switched off.In addition, if this period is oversize, even if then UE 100 has been ready to receive group communication service with ptp mode, MBMS data still unnecessarily may be forwarded to the 2nd eNB 100b by an eNB 100a.According to embodiment, after a predetermined period of time, an eNB 100a can stop to the 2nd eNB 100b transmitting MBMS data, and the end that the grouping that transmission has end mark (End Marker) forwards with notification data.

Because MME 140 provides the information about S-GW 150 to the 2nd eNB 110b in step 230, therefore UL data can be sent to GCSE-AS 200 via UE 100, the 2nd eNB 100b, S-GW 150 and PGW160.

In step 260, UE 100 can send message by UL data path to GCSE-AS 200, and this message comprises the information that notice does not support MBMS.Comprise at least one in information that notice do not support that the message of the information of MBMS can comprise the identifier of an eNB 110a and the 2nd eNB 110b, cell-of-origin identifier, target cell identifier, the identifier of UE 100, notice UE 100 have moved to non-MBMS community, MBMS SAI, TMGI and ServiceId.This message can be the unavailable message of MBMS.As shown in this step, ServiceId can share between UE100 and GCSE-AS 200, that is, group communication identifier application level defined.

If receive RRC connection in step 255 to have reconfigured message, then the 2nd eNB 110b can send handover notification (HANDOVER NOTIFY) message in step 265 to MME 140, and described handover notification message notifies successful execution transfer.Although not shown in Figure 2, but can adopt to exchange between MME 140 and S-GW 150 and/or between S-GW 150 and PGW 160 and revise the beared information (such as, transport layer address and TEID) that a kind of like this mode carrying requests/response messages carrys out Share update.

As mentioned above, GCSE-AS 200 can receive the message comprising the information of the unavailability of notifying MBMS service of such as MBMS unavailability message and so in step 260, UE 100 uses this message to notify that it has moved to non-MBMS community.According to embodiment, although not shown, the MME 140 having received handover notification message in step 265 can send the message of notice executed complete transfer to S-GW 150.This message can be Notification of Changes message.Now, Notification of Changes message can comprise target cell identifier.Notification of Changes message can be transferred to P-GW 160 from S-GW 15.P-GW160 can send target cell identifier to PCRF 190 and/or GCSE-AS 200.

In step 270, GCSE-AS 200 determines to be that UE provides group communication service with ptp mode, and exchanges for setting up new bearer and the information upgrading pre-established carrying.Now, GCSE-AS 200 can to PCRF 190 provide in MBMS session indicators, MBMS SAI, TMGI, ServiceId, QoS and group communication service feature at least one.The message reflection received can configure to carrying by PCRF 190.Above-mentioned group communication service feature can comprise the description about media or stream and priority, and can determine above-mentioned group communication service feature based on the information being transferred to GCSE-AS 200 via the GC1 interface between UE 100 and GCSE-AS 200 by UE 100.At this, the information transmitted by GC1 interface can comprise UE profile.

According to embodiment, above-described QoS can be the information different from following qos parameter:

-be transferred to the qos parameter of P-GW 160 in step 275 from RCRF 190;

-be transferred to the qos parameter of S-GW 150 in step 280 from P-GW 160;

-be transferred to the qos parameter of MME 140 in step 280 from S-GW 150;

-be transferred to the qos parameter of eNB 110b in step 280 from MME 140; And/or

-be transferred to the qos parameter of UE 100 in step 280 from MME 140.

As mentioned above, qos parameter can be the comprehensive information of at least one comprised in QCI, GBR, QoS information and ARP.Although describe in more detail later, qos parameter can be for the standardized configuration detail of carrying.Meanwhile, the QoS transmitted in step 270 may be more more not detailed than this qos parameter.Such as, ARP can comprise such as priority level, preemption capability and take the lead in the design parameter of fragility and so at least one.Priority level only can be sent to PCRF 190 by GCSE-AS 200, and PCRF 190 can use priority level and out of Memory (such as, MBMS session indicators, MBMSSAI, TMGI, ServiceId and group communication service feature) to generate other value (preemption capability and fragility of taking the lead) of ARP.

Meanwhile, PCRF 190 can derive following qos parameter:

-QCI: this determines according to ServiceId and/or group communication service feature.Can be that same group communication service specifies different CQI according to service features.Such as, high priority QCI can be distributed to the carrying of the UE 100 of the fire fighter being arranged to negative substantial responsibility in the group communication service of fireman.If identify group communication service based on ServiceId or group communication service feature, then can be defined as the QCI that this group communication service newly defines.Group communication service feature can comprise media or stream and precedence information.According to embodiment, precedence information can be used to the object different from the object of the priority level be comprised in QoS (such as, the precedence information be comprised in group communication service feature can be used to the priority determining QCI, and the priority level be comprised in QoS can be used to the priority level determining ARP).

-priority level: according to embodiment, priority level can be the priority level itself be comprised in QoS, or the priority level derived by processing the priority level that is comprised in QoS.When deriving priority level in the priority level be comprised in QoS by process, PCRF 190 can have (the every ServiceId's) priority level transmitted by GCSE-AS200, and maps the priority level of the configuration information generated by PCRF 190.

-preemption capability/fragility of taking the lead: this suitably can configure by considering the priority level that be comprised in QoS and/or ServiceId.

In step 275, PCRF 190 can send IP-CAN session modification message to P-GW 160.Can trigger in the message of step 270 reception and transmit IP-CAN session modification message from PCRF 190 to P-GW 160.PCRF 190 can also send to P-GW 160 the IP-CAN session modification message triggered by the positional information of UE 100, and the positional information of described UE 100 receives from the P-GW 160 receiving Notification of Changes message.IP-CAN session modification message can comprise at least one in MBMS Session ID, MBMS SAI, TMGI, ServiceId, qos parameter.Therefore, in step 280, P-GW 160, S-GW 150, the 2nd eNB 110b, MME 140 and UE 100 can set up or more new bearer.Now, the carrying that (because establishing default bearer) great majority are created is dedicated bearer.According to embodiment, the carrying that will be updated can be default bearer or dedicated bearer.According to embodiment, at least one in MBMS session indicators, MBMS SAI, TMGI, ServiceId and qos parameter can be comprised in the establishment/renewal bearing request message creating/more use in new bearer.MME 140 can more above-mentioned information (in MBMS session indicators, MBMS SAI, TMGI, ServiceId and qos parameter at least one), and map E-RAB and the carrying triggered by PCRF 190.Now, MME 140 can distribute suitable EPS bearer identifier.

In more detail, P-GW 160 can (now, qos parameter can comprise at least one in QCI, GBR QoS information and ARP based on the MBMS session indicators received from PCRF 190, MBMS SAI, TMGI, ServiceId and qos parameter.At this, at least one in QCI, GBR QoS information and ARP can be the value that group communication specifically distributes according to carrier network) determine carrying.P-GW 160 can adopt and use the different mode of the normal condition of at least one of above-mentioned information to determine to carry with (such as, when qos parameter is provided).Under normal circumstances, P-GW 160 new IP stream can be added to meet existing qos parameter carrying on, instead of create new bearer.But, in this embodiment, P-GW 160 can consider the reason of the up-to-date MBMS of transmitting session indicators, MBMS SAI, TMGI, ServiceId information and qos parameter create/upgrade new bearer.At least one in MBMS session indicators, MBMS SAI, TMGI, ServiceId and qos parameter can be added in the bearer context of its management by P-GW 160.

In step 280, P-GW 160 can to S-GW 150 send in MBMS session indicators, MBMSSAI, TMGI, ServiceId information and qos parameter at least one.Now, the message of carry information can be create/upgrade bearing request message.S-GW 150 can at least one in the bearer context of its management in store M BMS session indicators, MBMS SAI, TMGI, ServiceId information and qos parameter.S-GW 150 can to MME 140 send in MBMS session indicators, MBMSSAI, TMGI, ServiceId information and qos parameter at least one.The message of carry information can be create/upgrade bearing request message.MME 140 can at least one in the bearer context of its management in store M BMS session indicators, MBMS SAI, TMGI, ServiceId information and qos parameter.Based in the transfer routine of S1, MME 140 can to target eNB (i.e. the 2nd eNB) 110b send in MBMS session indicators, MBMS SAI, TMGI, ServiceId information and qos parameter at least one.

In step 280, MME 140 can at least one in the 2nd eNB 110b transmission MBMS session indicators, MBMS SAI, TMGI, ServiceId information and qos parameter.The message of carry information can be that E-RAB arranges request (E-RAB SETUP REQUEST) message.2nd eNB 110b can at least one in the bearer context of its management in store M BMS session indicators, MBMS SAI, TMGI, ServiceId information and qos parameter.

Simultaneously, be necessary to mark the carrying of the carrying group communication service data characteristic features for reflection group communication service, such as intermittence (such as, the feature of the discrete date transmission feature occurred in the service of such as PTT (Push To Talk) and so on) and short delay requirement (such as, for the requirement that the people of the responsible public safety by such as police and so on uses).Now, at least one that can use in MBMS session indicators, MBMS SAI, TMGI, ServiceId information and the qos parameter that can be transferred to the 2nd eNB 110b via P-GW 160, S-GW 150 and MME 140 marks the reflection of the feature of group communication service.Such as, at least one in MBMS session indicators, MBMS SAI, TMGI, ServiceId information and qos parameter can be set to the characteristic reflecting group communication service, so that identified group communication service.Meanwhile, qos parameter can be the information of the characteristic of reflection group communication service.

As follows qos parameter can be set to the characteristic reflecting group communication service:

-introduce new QCI value;

-create new designator.

Now, utilize resource type, priority, packetization delay budget and packet error Loss Rate various combination to provide each QCI value.Therefore, when introducing new QCI value, new QCI value can be designated as the combination of the resource type different from the QCI value of previous definition, priority, packetization delay budget and packet error Loss Rate.

In this case, can for following at least one generate new QCI value.In other words, new QCI value is applicable to mission critical PTT speech data, non-critical task PTT speech data, mission critical PTT signaling, non-critical task PTT signaling, key transparent task PTT signaling, normal group communication carrier (this can be divided into signaling and user data in detail) and mission critical (video) data and public safety carrying (this can be divided into signaling and user data in detail).According to embodiment, the resource type of the QCI value corresponding with the speech data in new QCI value may correspond in ensureing bit rate (GBR).The resource type of the QCI value corresponding with signaling can be non-GBR.According to embodiment, in order to indicate the intermittence of PTT speech data, except traditional GBR, new resources types value can also be defined, such as happen suddenly GBR and mixing GBR (now, except burst GBR and mixing GBR, can name resource type with representing other title intermittent).Can be that the resource type of the QCI value corresponding with PTT speech data specifies new resources types value (such as, happen suddenly GBR and mix GBR).According to embodiment, even the carrying with new resources types value also can comprise GBR QoS information.In other words, even if when resource type is not GBR, carrying also can comprise GBR QoS information.By this way, this new QCI value can be mapped to suitable traditional GBR QCI value by the node (such as, UE) without the information of the new QCI value about instruction new resources types value.

According to embodiment, when generating new designator, new designator can comprise the designator of instruction carrying, and the bearer context of described carrying comprises at least one that intermittent and short delaing time requires in feature.

Except using the operation of traditional Q oS parameter, the 2nd eNB 110b can with at least one in MBMS session indicators, MBMS SAI, TMGI, ServiceId information and qos parameter perform in following operation at least one:

-X2 transfer in in another eNB (such as, the 3rd eNB) MBMS transmission session indicators, MBMS SAI, TMGI, ServiceId information and qos parameter at least one (this operation can will with reference to Fig. 3 describe step 340 after execution).

-access control;

Such as, if the feature of carrying is intermittence, although do not support corresponding GBR QoS information at present, this carrying can be accepted.

-determine the change of PTP and PTM of corresponding group communication service;

-scheduling;

-configuration and/or adjustment DRX parameter;

Such as, if (the first grouping for sudden down link data/signaling) requires relatively short delay, then DRX parameter can be shortened.

-configure and/or adjust sluggish timer.

Such as, carry the group communication service be associated if can identify with corresponding, and in the 2nd eNB 110b, therefore set up the multiple carryings being used for particular group communication service, then the 2nd eNB 110b can determine to provide group communication service with PTM pattern.

In step 285, P-GW 160 can send IP-CAN session modification message to PCRF 190.At least one in MBMS session indicators, MBMS SAI, TMGI, ServiceId information and qos parameter can be comprised in the message of step 285 transmission.

Therefore, UE 100 can receive group communication service with ptp mode.Except refer step 255 describe (in special time period, MBMS data is transferred to the 2nd eNB 110b's together with end mark from an eNB 110a) outside group communication data transmission method, it is also conceivable to the method for the disruption being alleviated group communication data by the method for step 295.

Part or all of process from step 270 to step 290 can be applied to the X2 described below to transfer.In addition, it also can be applied to creating and/or amendment and normal group communicate the process that the PTP that is associated carries.

According to embodiment, the part process from step 270 to step 290 can be applied to similarly the transmission in PTM pattern.Such as, following process can be applied to MBMS load creating and/or amended routine similarly, describedly to be treated to: PCRF 190 receives the information required by configuration qos parameter (in MBMS session indicators, MBMS SAI, TMGI, ServiceId, QoS and group communication service feature at least one) from GCSE-AS 200, for determine this qos parameter and this information is sent in PTP load creating and/or adjustment routine, require this qos parameter communication entity 160,150,140,110b and 100.

In more detail, when MBMS carries, GCSE-AS 200 can to BM-SC 180 send in MBMS session indicators, MBMS SAI, TMGI, ServiceId, QoS and group communication service feature at least one.MB-SC 180 can derive qos parameter according to the information received from GCSE-AS200 as PCRF 190.Then, MB-SC 180 sends (when generating new MBMS session) new that derive or that (during in new and old MBMS session) is revised qos parameter via MBMS GW 170 and MME 140 to MCE 120.When PTP carries, MCE 120 can perform a part for the operation performed by eNB 110b.In other words, notice the feature of MBMS carrying (broadcast), there is no need for the complicated RRM of the resource of MBMS carrying, the resource that eNB 110b can use corresponding MBMS to carry only forwards the data from MCE 120, and MCE120 can perform the partial function of eNB 110b.Now, MCE 120 qos parameter that is new or amendment in the message being comprised in the MBMS session start request and the request of MBMS session updates and so on that are such as received by M3 interface 125 can be used to perform in following operation at least one.

The process of taking the lead between MBMS carrying of-use ARP information.Now, may to stop using existing MBMS session or set up MBMS session according to the priority level of old MBMS session and new MBMS session.

-set up new MBMS session.

-consider qos parameter that is new or amendment and configure MBMS schedule information (such as, to eNB 110b transmitting physical multicasting channel (PMCH) configuration information and/or subframe configuration information).

Get back to PTP carrying, in step 295a, just before with ptp mode transmission group communication data, GCSE-AS 200 can to BM-SC 180 send in end mark, UE identifier and cell-of-origin identifier at least one.Can via MBMS GW170 at least one in eNB 110a transmission end mark, UE identifier and a cell-of-origin identifier by step 295b and 295c, MB-SC 180.In step 295d, an eNB 110a can send end mark to the 2nd eNB 110b.After this, an eNB 110a can not send MBMS data to the 2nd eNB 110b.

Before reception end mark, the 2nd eNB 110b sends the data with priority received from an eNB 110a to UE 100.After reception end mark, the 2nd eNB 110b sends the data received from S-GW 150 to UE 100.

Above-described embodiment in order to make the suitably processed group communication service carrying of Radio Access Network (RAN) and/or core network (CN), according to feature (the intermittent and/or short delaing time requires) method to the new QCI value of the bearing mark of group communication service of group communication service.

Now, if all eNB 110 in carrier network are upgraded, and they share new QCI value, then they can suitably processed group communication service carrying.Notice and once need the too many eNB110 that upgrades, and some eNB 110 of such as family eNB 110 and so on even departs from the management of Virtual network operator, so be difficult to expect that once upgrading is arranged in all eNB 110 of carrier network.

In this case, if the carrying with not supported QCI value and/or carrying amendment to not supported QCI value are set up at least one request of being set up in routine, bearing modification routine and transfer routine by carrying, then the eNB 110b be not also upgraded can notify carrying foundation with suitable failure cause and/or revise unsuccessfully.Now, reason can be set to not supported QCI value.In this case, carrying set up and/or revise and unsuccessfully inform to PGW 160 via MME 140 and S-GW 150, correspondence being carried and can be released or be back to former state.

In this case, can new bearer be set up via PCRF 190 or S-GW 150 to PGW 160 transmission notice/instruction or revise old carrying to provide the message of the necessity of group communication service smoothly.When receiving this message, P-GW 160 can determine to set up new bearer or revise old carrying.Such as, P-GW160 can transmit establishment/renewal bearing request message to ask to create the carrying with new QCI value.In addition, P-GW 160 can transmit the renewal bearing request message that the QCI value of old carrying is modified as new QCI value by request.

Do not upgrade and therefore do not support that the eNB 110 of new CQI value can use suitable reason to notify carrying set up and/or revise unsuccessfully.In this case, carrying can be released or be back to former state, and PGW 160 can ask carrying to set up/amendment again.According to embodiment, when eNB 110 provides service to UE100, this situation may repeat to occur.

Above-mentioned situation may cause signaling to waste and group communication service mistake.Therefore, be necessary to notify that corresponding eNB 110 does not support new QCI value to P-GW160 and/or PCRF 190.

According to the present embodiment, P-GW 160 and/or PCRF 190 can identify provides the eNB 110 of service not support new QCI value to UE 100.In addition, the carrying with (suboptimum) QCI value being applicable to group communication service can also be set up or revise old carrying and make it have (suboptimum) QCI value being applicable to group communication service.

With reference to Fig. 9, in step 910, to MME, eNB 110 can notify that eNB 110 does not support new QCI value.Then, in step 920, to S-GW 150, MME 140 can notify that eNB 110 does not support corresponding QCI value.Subsequently, to P-GW 160, S-GW 150 can notify that eNB 110 does not support corresponding QCI value.

Identify in step 910 MME 140 that eNB 110 does not support corresponding QCI value, one of following methods can be used to notify that eNB 110 does not support corresponding QCI value in step 920 to S-GW 150:

-create in carrying response, more new bearer response and amendment bearing response message at least one in insert suitable reason (such as, be rejected in RAT and not supported QCI value); And

-insert the designator that instruction eNB 110 does not support corresponding QCI value.

Obviously, S-GW 150 can use and is used for S-GW 150 notifies that eNB 110 do not support in the method for corresponding QCI value by MME 140 to P-GW 160, at least one notifies that eNB 110 does not support corresponding QCI value.

In step 930, P-GW 160 can exchange information about QCI parameter with PCRF 190.Therefore, at least one in PCRF 190 and P-GW 160 can know that eNB 110 does not support corresponding CQI value.Subsequently, when determining to set up and revise carrying or when being sent in the qos parameter carrying out using during this is determined, consider that eNB 110 does not support corresponding QCI value, for group communication service specifies suitable QCI in the CQI value can supported at eNB 110.

According to embodiment, the message transmitted in step 920 can be included as the cell identifier (ECGI) that UE 100 provides the eNB110 of service.Therefore, if P-GW 160 and/or PCRF 190 has ECGI configuration information, then in step 940, P-GW 160 and/or PCRF 190 can carry out whether inference supports corresponding QCI information about eNB 110 based on the ECGI be contained in the message of step 920 reception.

According to embodiment, the CQI value supportable of eNB 110 can not be informed to P-GW 160, therefore P-GW 160 and/or PCRF 190 may not have ECGI configuration information.In this case, in step 950, in carrying foundation/amended routine, the CQI value supportable of eNB 110 can be informed to P-GW 160 and/or PCRF 190.

In more detail, a kind of scheme receives the information of the QCI value supportable about eNB 110 in step 950-a via MME 140, and another program receives the information of the CQI value supportable about eNB 110 in step 950-b via GCSE-AS 200.

In other words, S-GW 150/P-GW 160 can be ordered to revise bearing resource in step 950-a, MME 140.The message used in this step can be bearing resource command messages.This message can comprise the designator that notice eNB 110 does not support corresponding QCI value.According to embodiment, MME 140 by remembeing in the cause value of step 910 reception or setting up in routine by the S1 in advance between eNB 110 with MME 140 information receiving and do not support corresponding QCI value about eNB 110, can identify eNB 110 and does not support corresponding QCI value.

In step 950-b, be apprised of the necessity of carrying foundation/amendment from UE 100 or itself identified the GCSE-AS 200 of the necessity carrying foundation/amendment, can comprise to P-GW 160 transmission the message that notice eNB 110 does not support the designator of corresponding CQI value.According to embodiment, this designator can be transmitted via PCRF 190.

Fig. 3 illustrates according to an embodiment of the invention based on the signal flow graph of the transfer routine of X2.

According to embodiments of the invention, by being established to the group communication service radio bearer of target eNB 110b in based on the transfer routine of X2 in advance, group communication service disruption can be alleviated.

With reference to Fig. 3, before beginning is based on the transfer of X2, MCE 120 can be that an eNB 110a configures MBMS beared information when setting up MBMS session.In step 310, MCE 120 can send to an eNB 110a message comprising MBMS beared information.MBMS beared information can comprise qos parameter.Because qos parameter described above, describe in detail so omit at this.This message can be one in MBMS session start request message and MBMS session updates request message.

According to embodiment, in step 310, MBMS beared information only can be transferred to an eNB110a.MBMS beared information is transferred to the radio bearer that an eNB 110a is established to the eNB 110a not supporting MBMS in advance, to eNB 110a MBMS transmission data.Therefore, MBMS beared information only can be addressed to an eNB 110 at the edge being positioned at MBMS region or MBSFN region.

When step 310 receives the message comprising MBMS beared information, an eNB 110a can store received MBMS beared information.In step 315, in response to the message received in step 310, an eNB 110a can send response message to MCE 120.Described response message can be one in MBMS session start response message and MBMS session updates response message.

If normally set up MBMS session and complete the configuration of MBMS wireless channel and amendment in an eNB 110a, then the UE 100 of service is provided to receive service by MBMS by an eNB 110a.As shown in phantom in Figure 3, group communication data are sent to UE 100 via GCSE-AS 200, MB-SC 180, MBMS-GW170 and an eNB 110a.

In step 318, the UE 100 receiving MBMS can send message to an eNB 110a, and this message comprises instruction, and it is receiving or the interesting information receiving MBMS.This message can be one in MBMS interest Indication message and MBMS counting response message.

If receiving to comprise from UE 100 indicates UE 100 receiving or the interesting message receiving the information of MBMS, then an eNB 110a can upgrade the beared information of UE 100 in step 320.In more detail, the MBMS beared information that the beared information that an eNB 110a can revise UE 100 receives from MCE 120 to be included in step 310.

One eNB 110a and the 2nd eNB 110b can share the information of the MBMS supported about them.In step 325, the service cell information IE (Served Cell Information IE) being contained TMGI by exchange packets between an eNB 110a and the 2nd eNB 110b has carried out information sharing.

Subsequently, when UE 100 moves, an eNB 110a may become and be not suitable for as UE 100 provides service.Now, an eNB 110a selects to be well-suited for the 2nd eNB110b that UE 100 provides service, and is that UE 100 makes the decision transferred to the 2nd eNB 110b.

In step 340, an eNB 110a can send to the 2nd eNB 110b the message comprising Handoff Request information, such as Handoff Request (HANDOVER REQUEST) message.Described handoff-request message can comprise the IE carrying MBMS beared information.Described IE can comprise qos parameter, bearer identifier, DL transmission propose designator, S-GW 150 transport layer address and at least one in the TEID of the S-GW 150 of UL PDU.According to embodiment, if this message comprises MBMS beared information, then can comprise in MBMS beared information for notifying to the 2nd eNB 110b the new designator that corresponding informance is associated with MBMS.In addition, except inserting the method for new designator, can also come to notify to use MBMS carrying to the 2nd eNB 110b by making agreement to the use of the bearer identifier that only can be assigned to MBMS carrying.

In step 340, for by it for UE 100 provides each MBMS carrying of service, when UE is handed over to the 2nd eNB 110b not supporting corresponding MBMS to carry, an eNB 110a can transmit the IE carrying MBMS beared information.Transmission conditions similarly can be applied to step 225.

Owing to carrying out the transfer of data by MBMS from MBMS GW 170, instead of the transfer of data of carrying out from S-GW 150 by MBMS, and do not allow UL transfer of data, therefore MBMS beared information can not comprise transport layer address and the TEID for UL PDU, and these are different from normal ptp mode beared information.According to embodiment, an eNB 110a can send by the transport layer address of the S-GW 150 of arbitrary disposition and the TEID for UL PDU to the 2nd eNB110b.In addition, specific transport layer address and/or the TEID for UL PDU can also be sent, described specific transport layer address and/or be configured to instruction MBMS carrying for the TEID of UL PDU corresponding carrying is MBMS carrying to make the 2nd eNB 110b learn.

According to embodiment, handoff-request message can comprise E-RAB information.Among E-RAB, the carrying for group communication service can comprise at least one in MBMS session indicators, MBMS SAI, TMGI and ServiceId.Owing to describing dependent routine with reference to Fig. 2, therefore omit at this and describe in detail.

In step 345, the 2nd eNB 110b can send Handoff Request acknowledge message to an eNB 110a.2nd eNB 110b can determine whether to accept each carrying in the carrying that its information is comprised in handoff-request message.Handoff Request acknowledge message can comprise about comprising by the information of the carrying of the MBMS carrying of the 2nd eNB 110b acceptance.MBMS beared information can comprise bearer identifier, qos parameter and for will by the one eNB 110a send UL/DL data TEID/ transport layer address at least one.

According to embodiment, Handoff Request acknowledge message can comprise E-RAB information.Among E-RAB, MBMS session indicators, MBMS SAI, TMGI, ServiceId and at least one the TEID/ transport layer address of UL/DL data that will receive from an eNB 110a can be comprised for the carrying of group communication service.In more detail, in step 340, the 2nd eNB 110b can receive E-RAB information from an eNB110a, and this E-RAB packets of information is containing at least one in MBMS session indicators, MBMS SAI, TMGI and ServiceId.At least one in MBMS session indicators, MBMS SAI, TMGI and ServiceId can be added in the described E-RAB information of at least one comprising in MBMS session indicators, MBMS SAI, TMGI and ServiceId that receives from MME 140 by the 2nd eNB 110b.

Then, an eNB 110a can send RRC to UE 100 and connect that to reconfigure message synchronous with what make UE 100 obtain with the community of the 2nd eNB 110b, and the community of described 2nd eNB 110b will provide service by the 2nd eNB 110b.

As shown by the dotted line in fig. 3, if receive Handoff Request acknowledge message, then an eNB 110a uses the transport layer address and TEID that are comprised in this message to the 2nd eNB 110b transmitting MBMS data.

Data transmission is carried out in the so a kind of mode being transmitted the data (MBMS E-RAB) received by MBMS path by PTP path (PTP E-RAB).MBMS E-RAB and PTP E-RAB can be mapped by least one in the MBMS received in step 345 session indicators, MBMS SAI, TMGI and ServiceId and MBMS E-RAB information being compared.

In step 355, connect reconfigure message in response to RRC, UE 100 can send RRC connection to the 2nd eNB110b and reconfigure message.Therefore, UE 100 and the 2nd eNB 110b can carry out UL with DL and communicate.UE 100 can receive MBMS data via GCSE-AS 200, BM-SC 180, MBMS GW170, an eNB 110a and the 2nd eNB 110b.According to embodiment, in scheduled time slot, an eNB 110a can to the 2nd eNB 110b transmitting MBMS data.Scheduled time slot can with consider be comprised in MBMS data SYNC layer header in timestamp information and in the temporal information that received by handover command message at least one and value that is preset or that calculate is corresponding.If this period is too short, then, before UE 100 is ready to receive group communication service with ptp mode (after step 390), group communication service may be temporarily switched off.In addition, if this period is oversize, even if then UE 100 has been ready to receive group communication service with ptp mode, MBMS data still unnecessarily may be forwarded to the 2nd eNB 100b by an eNB 100a.According to embodiment, after a predetermined period of time, an eNB 100a can stop to the 2nd eNB 100b transmitting MBMS data, and the end that the grouping that transmission has end mark forwards with notification data.

Because an eNB 110a provides the information about S-GW150 to the 2nd eNB 110b in step 340, therefore UL data can be sent to GCSE-AS 200 via UE 100, the 2nd eNB 100b, S-GW 150 and PGW 160.

In step 360, UE 100 can send message by UL data path to GCSE-AS 200, and this message comprises the information that notice does not support MBMS.Comprise at least one in information that notice do not support that the message of the information of MBMS can comprise the identifier of an eNB 110a and the 2nd eNB 110b, cell-of-origin identifier, target cell identifier, the identifier of UE 100, notice UE 100 have moved to non-MBMS community, MBMS SAI, TMGI and ServiceId.This message can be the unavailable message of MBMS.

If receive RRC connection in step 355 to have reconfigured message, then the 2nd eNB 110b can in step 365 to MME 140 transmit path handover request (PATH SWITH REQEUST) message, the transfer of described path handover request message informing successful execution.This message can comprise MBMS beared information.Described MBMS beared information can comprise following at least one item: the transport layer address of bearer identifier, the 2nd eNB 110b, be the designator of MBMS carrying for the TEID of DL PDU and the corresponding carrying of notice.Can use and utilize the bearer identifier of agreement, TEID and/or transport layer address impliedly to indicate the method using MBMS carrying, corresponding carrying is MBMS carrying to replace utilizing designator to notify clearly.

According to embodiment, MME 140 possibly cannot identify the MBMS beared information be included in the handover request message of path in advance.Tradition MME 140 can comprise the information of the corresponding carrying of notice refusal in path Handover Request Acknowledge (PATH SWITCHREQUEST ACKNOWLEDGEMENT) message.Such as, E-RAB will d/d list IE (E-RAB To Be Released List IE) can containing MBMS carrying identifier.But if the 2nd eNB 110b has identified outside its border being positioned at MBSFN region, and be therefore configured with relevant information, carry with PTP although then can not distinguish MBMS carrying, MME 140 can accept MBMS carrying.For this situation, can use the equipment of such as OAM equipment that the positional information of the 2nd eNB 110b is configured to MME 140.Can check out between MME 140 and the 2nd eNB 110b that corresponding carrying is that the method for MBMS carrying (comprises the method that the corresponding carrying of notice is the designator of MBMS carrying if used, and the method utilizing the bearer identifier of agreement, TEID and/or transport layer address impliedly to indicate), then there is no need the positional information forcing to use the equipment of such as OAM equipment to configure the 2nd eNB 110b in advance.

As mentioned above, in step 360, GCSE-AS 200 can use the instruction that comprises of the unavailable message of such as MBMS and so on not support that the message of the information of MBMS has moved to identify UE 100 community not being suitable for MBMS.According to embodiment, although not shown, the MME 140 having received path handover request message in step 365 can send to S-GW 150 message notifying the complete transfer of executed.Now, this message can be Notification of Changes message.Notification of Changes message can be transferred to P-GW 160 from S-GW 150.P-GW 160 can send target cell identifier to PCRF 190 and/or GCSE-AS 200.

Although not shown in Figure 3, but can adopt to exchange between MME 140 and S-GW 150 and/or between S-GW 150 and PGW 160 and revise the beared information (such as, transport layer address and TEID) that a kind of like this mode carrying requests/response messages carrys out Share update.

In step 370, GCSE-AS 200 can determine to provide group communication service with ptp mode, and exchanges with PCRF 190 necessary information setting up new bearer and new and old carrying.

In step 375, PCRF 190 can send IP-CAN session modification message to P-GW 160.Can trigger in the message of step 370 reception and transmit IP-CAN session modification message from PCRF 190 to P-GW 160.PCRF 190 can also send to P-GW 160 the IP-CAN session modification message triggered by the positional information of UE 100, and the positional information of described UE 100 receives from the P-GW 160 receiving Notification of Changes message.IP-CAN session modification message can comprise qos parameter.Therefore, in step 380, P-GW 160, S-GW 150, the 2nd eNB 110b, MME 140 and UE 100 can set up or more new bearer.In step 385, P-GW 160 can send IP-CAN session modification message to PCRF 190.The message transmitted in step 385 can comprise qos parameter.

Therefore, UE 100 can adopt ptp mode to receive group communication service.Except refer step 355 describe (in special time period, MBMS data is transferred to the 2nd eNB 110b's together with end mark from an eNB 110a) outside group communication data transmission method, it is also conceivable to the method for the disruption being alleviated group communication data by the method for step 395.

Just before with ptp mode transmission group communication data, GCSE-AS 200 can to BM-SC 180 send in end mark, UE identifier and cell-of-origin identifier at least one.Can via MBMS GW 170 at least one in eNB 110a transmission end mark, UE identifier and a cell-of-origin identifier by step 395b and 395c, MB-SC 180.In step 395d, an eNB 110a can send end mark to the 2nd eNB 110b.After this, an eNB 110a can not send MBMS data to the 2nd eNB 110b.

Fig. 4 illustrates that information of collecting according to an embodiment of the invention is for being made at the decision that switches between ptp mode and MBMS pattern to improve the signal flow graph of the routine of the level of resources utilization.

According to embodiments of the invention, the quantity that reality receives the UE 100 of service in correspondence carrying can be counted, and this value is informed to GCSE-AS 200, make GCSE-AS 200 be made at the decision switched between ptp mode and MBMS pattern.

With reference to Fig. 4, in step 400, MCE 120 can send MBMS Counting requests (MBMS SERVICE COUNITING REQUEST) message to eNB 110.This message can comprise TMGI, so that instruction receives the quantity of the UE of a certain service.According to embodiment, by the request that directly receives from another entity (such as, GCSE-AS 200 and BM-SC 180) or triggered step 400 can be carried out via the request that other entity receives indirectly.

ENB 110 and UE 100 can exchange MBMS Counting requests message and MBMS counting response message to check whether this UE 100 receives MBMS.

In step 420, eNB 110 can send the information of the quantity of the UE 100 about the service receiving asked TMGI to MCE 120.

In step 430, MCE 120 can send to GCSE-AS 200 and be comprised in MBMS count results that step 420 receives from eNB110 and report part or all information in (SERVICE COUNTING RESULTREPORT) message.Can directly by the new interface that defines between MCE 120 and GCSE-AS 200 or transmit this information by the path of MCE 120-MME 140-MBMS GW170-BM-SC 180-GCSE-AS 200.In the case of the latter, the count results of each TMGI can be transferred to GCSE-AS 200 via the GC2 interface 185 newly defined for group communication.GCSE-AS 200 can determine the switching between ptp mode and MBMS pattern based on received information.Such as, if have a large amount of UE 100 receiving or the interesting service receiving corresponding TMGI, then GCSE-AS 200 can be switched to MBMS pattern (if UE 100 is receiving receive service with ptp mode)/maintenance MBMS pattern (if UE 100 receives service with MBMS pattern).If have a small amount of UE 100 receiving or the interesting service receiving corresponding TMGI, then GCSE-AS 200 can be switched to ptp mode (if UE 100 receives service with MBMS pattern)/maintenance ptp mode (if UE 100 receives service with ptp mode).How to be switched to ptp mode and can to follow part or all of process from step 270 to step 290.

Except said method, GCSE-AS 200 can obtain the necessary information for being made at the decision switched between ptp mode and MBMS pattern from the message transmitted by the GC1 interface (can be the interface of application level) between GCSE-AS 200 and UE 100.Now, GCSE-AS 200 uses GC1 message to notify the transmission mode for providing service to UE 100.Therefore, UE 100 (if UE 100 is in idle pulley, then after being converted to connection mode) can notify to provide service with ptp mode or MBMS pattern to GCSE-AS 200.GCSE-AS 200 is made at the decision switched between ptp mode and MBMS pattern based on the information that UE 100 provides.

Fig. 5 is the signal flow graph that the UE 100 illustrating according to an embodiment of the invention under idle pulley seamlessly provides the routine of group communication service.

According to embodiments of the invention, designator can be transferred to the UE 100 of the marginal reception MBMS just in MBSFN region and/or MBMS region, make UE 100 be converted to connection mode.In alternative embodiments, this can be applied to the UE 100 be under connection mode, to maintain the service continuity of the UE 100 at the edge for being in MBSFN region and/or MBMS region.

With reference to Fig. 5, in step 500, eNB 110 can send edge indicator to UE 100.According to embodiment, the eNB of transmission edge indicator can be in the edge in MBSFN region and/or MBMS region.According to embodiment, edge indicator can be transmitted on BCCH or MCCH.Now, edge indicator can comprise at least one that instruction respective cell/eNB 110 is in the designator at edge, TMGI, ServiceId, MBMS Session ID and one or more MBMS SAI.

According to embodiment, based on measurement result, UE 100 can judge that it is in edge.Such as, at least one of the parameter obtained from measurement result and specific threshold can compare by UE 100, determine whether it is in edge.Threshold value can be the value received from GCSE-AS 200, eNB 110 and/or EPC 199.Such as, UE 100 can carry out receive threshold by GC1 message, RRC information, system information block (SystemInformationBlock) or NAS message.

According to embodiment, measurement result can be the result of the measurement of reference signal (RS).The example of RS can comprise channel state information reference signals (CSI-RS) and cell special reference (CRS).Measurement result and threshold value can compare to determine whether it is in border by UE.

According to embodiment, eNB 100 or EPC 199 can from GCSE-AS 200 directly or carry out receive threshold via at least one entity (such as BM-SC, MBMS-GW, MCE, P-GW, S-GW and MME).Received threshold value can be forwarded to UE 100 by eNB 100 or EPC 199.Although do not illustrate in the drawings, threshold value can be transferred to eNB 100 or EPC 199 from GCSE-AS 200 via MCE 120, MBMS-GW 170 or BM-SC 180.

In step 510, UE 100 can change connection mode into.Now, RRC connection request message can be transmitted.This message can comprise be set to single signaling (mo-Signalling), forms data (mo-Data), postpone to allow access (delayTolerantAccess), high priority access (highPriorityAccess) and newly one of MBMS reason of being correlated with set up reason (EstablishmentCause).UE can Trigger services request or bearing resource renewal routine.

The UE 100 (if UE is in connection mode, then can omit step 510) having changed connection mode into or be in connection mode can trigger GCSE-AS 200 and perform for preparing service continuity and/or receiving the operation of keep-alive (keep-alive) message.This can come by transmitting GC1 message to GCSE-AS 200.

In more detail, UE 100 can at least one in the designator that GCSE-AS 200 sends eNB identifier, corresponding MBSFN region and/or MBMS region are left in cell identifier, instruction and the part/full detail being comprised in edge indicator.In an embodiment, if although UE 100 only sends eNB identifier or cell identifier to GCSE-AS 200, but GCSE-AS 200 has the information of the position about eNB 110, then can notify that eNB is in the edge in MBSFN region and/or MBMS region to GCSE-AS 200.Therefore, GCSE-AS 200 can identify the edge that UE 100 is in MBSFN region and/or MBMS region.

According to embodiment, be in except the method at the edge in MBSFN region and/or MBMS region except GCSE-AS 200 identifies UE 100 based on the edge indicator transmitted in step 520, GCSE-AS 200 can receive the information of community about providing service for UE 100 from ECP 199.In more detail, although do not illustrate in the drawings, P-GW 160 can receive Notification of Changes message via MME 140 and S-GW 150.The cell information be comprised in Notification of Changes message can directly be sent to GCSE-AS 200 or send to GCSE-AS 200 via PCRF 190 by P-GW 160.

If UE 100 stops for a long time at the edge in MBSFN region and/or MBMS region, then it may unnecessarily change between free time and connection mode.In order to prevent this situation, in step 530, GCSE-AS 200 can send keep-alive message with appropriate intervals to the UE being in edge.According to embodiment, appropriate intervals may need shorter than the inactive timer of UE.

Except with except the operation of appropriate intervals transmission keep-alive message, GCSE-AS 200 can by PTP path transmission/receive corresponding group communication data to maintain service continuity.Therefore, even if when not transmitting group communication data by PTM path, UE 100 also can receive group communication service by PTP path.ENB when setting up or revise PTP path as target can be the eNB comprising the community wherein being provided service by MBMS path for UE 100, or can be one of other eNB.Other eNB described is in wherein UE to be provided the MBSFN region of service and/or the eNB of MBMS region exterior.Owing to describing dependent routine with reference to Fig. 2 and Fig. 3 above, therefore omit at this and describe in detail.Such as, routine can follow the part or all of process from step 270 to step 290.

Fig. 6 is the block diagram of the configuration that eNB is according to an embodiment of the invention shown.

With reference to Fig. 6, eNB can comprise communication unit 620 and control unit 610 according to an embodiment of the invention.Control unit 610 control eNB performs the operation of one of above-described embodiment.Such as, control unit 610 can perform following operation by control eNB: from MCE receiving package containing qos parameter MBMS beared information, use MBMS beared information upgrade for UE beared information, determine UE transfer, to MME or do not support MBMS the handoff-request message of the 2nd eNB transmission package containing MBMS beared information, to UE transmission handover command message and in scheduled time slot to the second eNB transmitting MBMS data.

The communication unit 620 of eNB is according to one of above-described embodiment transmitting/receiving signal.Such as, communication unit 620 from MCE receiving package containing qos parameter MBMS beared information and in scheduled time slot to the second eNB transmitting MBMS data.

Fig. 7 is the block diagram of the configuration that UE is according to an embodiment of the invention shown.

With reference to Fig. 7, UE can comprise communication unit 720 and control unit 710 according to an embodiment of the invention.The control unit 710 control UE of UE performs the operation of one of above-described embodiment.Such as, control unit 710 control UE performs following operation: to the eNB message transfer receiving the MBMS beared information comprising qos parameter from MCE, and described message comprises notice UE and receiving or the interesting information receiving MBMS; Receive handover command message, described handover command message instruction determines to not supporting that the 2nd eNB of MBMS transfers according to the transfer of an eNB; Establish a connection to the 2nd eNB; The MBMS message being forwarded to the 2nd eNB in scheduled time slot from an eNB is received in from the 2nd eNB; Transmission package is containing the message of the information of the unavailability to the service of GCSE-AS 200 notifying MBMS; And utilize the 2nd eNB to set up carrying.

The communication unit 720 of UE is according to one of above-described embodiment transmitting/receiving signal.Such as, communication unit 720 can send to comprise to an eNB and notify that it is receiving or the interesting message receiving the information of MBMS, and can receive MBMS data by an eNB and the 2nd eNB.

Fig. 8 is the block diagram of the configuration that GCSE-AS is according to an embodiment of the invention shown.

GCSE-AS can comprise communication unit 820 and control unit 810 according to an embodiment of the invention.The control unit 810 control GCSE-AS of GCSE-AS performs the operation of one of above-described embodiment.Such as, the message of the information of the unavailability that control unit 810 control GCSE-AS serves from UE receiving package containing notifying MBMS, and control GCSE-AS provides PTP to serve via the 2nd eNB to UE based on this information.Control unit 810 can also receive from UE the edge indicator that instruction UE is in the edge in MBMS region by control GCSE-AS, and control GCSE-AS transmits keep-alive message to UE.Control unit 810 can also judge between ptp mode and MBMS pattern according to the information of quantity about the UE receiving MBMS from MCE switching by control GCSE-AS.

The communication unit 820 of GCSE-AS is according to one of above-described embodiment transmitting/receiving signal.Such as, when edge indicator instruction UE is in the edge in MBMS region, communication unit 820 from the message of UE receiving package containing the information of the unavailability of notifying MBMS service, and can transmit keep-alive message to UE.Communication unit 820 can also receive from MCE about the information of quantity of UE receiving MBMS.

In above-described embodiment, can optionally perform or omit step and transmission of messages.In each example, unnecessaryly perform step with described sequential order, but step can be performed with the order changed.Unnecessaryly can perform transmission of messages with sequential order.

Although used particular term to describe the preferred embodiments of the present invention, in order to help to understand the present invention, should with illustrative but not restrictive, sense treats specification and accompanying drawing.Obviously, when not departing from more broad spirit of the present invention and scope, those skilled in the art can carry out various amendment and change to the preferred embodiments of the present invention.

Therefore, should be appreciated that above-described embodiment in essence only for illustration of object, instead of limit the present invention by any way.Therefore, scope of the present invention should be determined by appending claims and their legal equivalents, instead of determine scope of the present invention by specification, and in claims, contain the variations and modifications in the definition and scope of claims.

Claims

1. the communication means of group communication service enable application server (GCSE-AS) in mobile communication system, described method comprises:

Multicast broadcast multimedia service (MBMS) information is not supported containing the instruction of group communication service identifier from end receiving package; And

When to described demanding terminal bearer update, upgrade necessary information to strategy and charging rule functions (PCRF) or broadcast/multicast service center (BM-SC) transmission bearer.

2. the method for claim 1, wherein the necessary packets of information of described bearer update contains at least one in described group communication service identifier, group communication service feature and priority level.

3. the method for claim 1, also comprises: based on the described group communication service identifier received from described terminal, and determining will to the described group communication service identifier of described PCRF or described BM-SC transmission and priority level.

4. strategy and the communication means of charging rule functions (PCRF) in mobile communication system, described method comprises:

The necessary information of bearer update is received from group communication service enable application server; And

More new bearer configuration is carried out based on received bearer update information.

5. method as claimed in claim 4, wherein, the necessary packets of information of described bearer update is containing at least one in group communication service identifier, group communication service feature and priority level.

6. method as claimed in claim 4, also comprises: determine service quality class identifier (QCI), priority level, preemption capability and take the lead in fragility at least one.

7. method as claimed in claim 6, wherein, described QCI indicates at least one in mission critical PTT speech data, non-critical task PTT speech data, mission critical PTT signaling and mission-critical data.

8. the group communication service enable application server (GCSE-AS) of a mobile communication system, described GCSE-AS comprises:

Communication unit, described communication unit communicates with other network entity; And

Control unit, described control unit controls the information not supporting multicast broadcast multimedia service (MBMS) from end receiving package containing the instruction of group communication service identifier; And described control unit controls upgrading necessary information to during described demanding terminal bearer update to strategy and charging rule functions (PCRF) or broadcast/multicast service center (BM-SC) transmission bearer.

9. GCSE-AS as claimed in claim 8, wherein, the necessary packets of information of described bearer update is containing at least one in described group communication service identifier, group communication service feature and priority level.

10. GCSE-AS as claimed in claim 8, wherein, described control unit control is determined based on the described group communication service identifier received from described terminal will to the described group communication service identifier of described PCRF or described BM-SC transmission and priority level.

The strategy of 11. 1 kinds of mobile communication system and charging rule functions (PCRF), described PCRF comprises:

Control unit, described control unit controls to receive the necessary information of bearer update from group communication service enable application server, and controls to carry out more new bearer configuration based on received bearer update information.

12. PCRF as claimed in claim 11, wherein, the necessary packets of information of described bearer update is containing at least one in group communication service identifier, group communication service feature and priority level.

13. PCRF as claimed in claim 11, wherein, described control unit control to determine service quality class identifier (QCI), priority level, preemption capability and take the lead in fragility at least one.

14. PCRF as claimed in claim 13, wherein, described QCI indicates at least one in mission critical PTT speech data, non-critical task PTT speech data, mission critical PTT signaling and mission-critical data.